North America and Adjacent Oceans During the Last Deglaciation
Most Quaternary sediments in North America north of 45°N post-date the last deglaciation. This volume looks at those extensive deposits from the standpoints of timing, cause, and mechanism of the wastage of North American ice during the last deglaciation and the accompanying environmental changes in the nonglaciated and deglaciated areas. It particularly examines the mechanisms by which a mass of ice equivalent to 100 m of global sea-level was returned to the ocean within about 8,000 years. A truly comprehensive synthesis of marine and terrestrial information in 22 chapters grouped into five sections: Chronology of Disintegration of the North American Ice Sheets, Ice Core and Other Glaciological Data, the Nonglacial Physical Record on the Continent, Biological Record on the Continent, and Analysis and Summary. Includes two oversize color plates showing time-series maps of pollen densities and vegetation changes since 18 ka.
Late Wisconsin and early Holocene paleoenvironments of east-central North America based on assemblages of fossil Coleoptera
Published:January 01, 1987
Alan V. Morgan, 1987. "Late Wisconsin and early Holocene paleoenvironments of east-central North America based on assemblages of fossil Coleoptera", North America and Adjacent Oceans During the Last Deglaciation, W. F. Ruddiman, H. E. Wright, Jr.
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The examination of fossil assemblages of Coleoptera (beetles) in North America is a relatively new but rapidly growing research area. This chapter is an attempt to use suites of fossil Coleoptera to establish the nature and timing of different paleoenvironments at the margins of the Laurentide Ice Sheet as it advanced and retreated from the Great Lakes region. Some of the work is synthesized from previous publications, but some important data are from unpublished sites. Before the various sites illustrated in Figure 1 are discussed, certain assumptions must be restated that are implicit in the study of Quaternary insect...